Installation / Operation Instruction Manual

Page 23
Brute HIGH EFFICIENCY COMMERCIAL BOILERS AND VOLUME WATER HEATERS
®
Other methods of introducing combustion and ventilation
air are acceptable, providing they conform to the
requirements in the applicable codes listed above.
In Canada, consult local building and safety codes or, in
absence of such requirements, follow CAN/CSA B149.
Ducted Combustion Air
The combustion air can be taken through the wall, or
through the roof. When taken from the wall, it must be
taken from out-of-doors by means of a horizontal wall
terminal, kit, See Table 7.
See Table 4 to select the appropriate diameter air
pipe. When taken from the roof, a eld-supplied rain cap
or an elbow arrangement must be used to prevent entry
of rain water. (See Figure 17)
Use ABS, PVC, CPVC or galvanized pipe for the
combustion air intake. Route the intake to the boiler as
directly as possible. Seal all joints. Provide adequate
hangers. The unit must not support the weight of the
combustion air intake pipe. Maximum linear pipe length
allowed is shown in Table 4. Subtract 5 allowable linear
ft. (1.5m) for every elbow used.
The connection for the intake air pipe is at the top of the
unit.
In addition to air needed for combustion, air shall also be
supplied for ventilation, including air required for comfort
and proper working conditions for personnel. Refer to
the applicable codes.
NOTE: The ue temperature of the unit changes
dramatically with changes in operating water
temperature. Therefore, it is necessary to assess
the application of the boiler to determine the
required certied vent class. If the unit is installed
in an application where the ambient temperature
is elevated, and/or installed in a closet/alcove,
polypropylene, CPVC or stainless steel material is
required. If the system temperatures are unknown
at the time of installation, Class IIB or higher
venting material is recommended.
WARNING
Failure to use polypropylene CPVC or stainless steel
venting for the rst 20” (285-600) / 30” (199 / 210)
of vent material or for any part of the venting that is
installed inside a closet may lead to property damage,
personal injury or death. The proper length of this
material is supplied with boiler. Boilers in the U.S. may
use pipe included with the boiler.
Failure to use the appropriate vent material,
installation techniques, glues/sealants could lead to
vent failure causing property damage, personal injury
or death.
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel® (polyphenolsulfone) in non-metallic
venting systems is prohibited and that covering non-
metallic vent pipe and ttings with thermal insulation is
prohibited.
All venting must be installed according to this manual
and any other applicable local codes, including but
not limited to, ANSI Z223.1/NFPA 54, CSA B149.1,
CSAB149.2 and ULC-S636. Failure to follow this
manual and applicable codes may lead to property
damage, severe injury, or death.
3.C Venting
This unit is a Category IV appliance and may be
installed with PVC and CPVC that complies with ANSI/
ASTM D1785 F441, polypropylene that complies with
ULC-S636 Class IIb, or a stainless steel venting system
that complies with UL 1738 Standard. (See Table 6)
The unit’s vent can terminate through the roof, or
through an outside wall.
When using PVC/CPVC for vent material, venting
must be connected to the CPVC section included with
sizes 80-850. The CPVC vent section included with
the unit may be broken by CPVC ttings if necessary,
but never reduced in total length. See Table 4 to
select the appropriate vent pipe diameter. When using
polypropylene, all vent material must be produced by
the same manufacturer, and have a ULC-S636 rating.
All installations should be done following the vent
supplier’s recommended installation techniques.
If manufacturer’s instructions are not available
for the material used, follow the manufacturers
recommendations.
Route vent pipe to the heater as directly as possible.
Please see Table 4 on page 20 for proper diameter vs.
length allowed.
NOTE: The vent pipe must pitch upward, toward
the vent terminal, not less than 1/4” per foot, so
that condensate will run back to the unit and drain
out thru the condensate trap. Horizontal portions of
the venting system must be supported to prevent
sagging and may not have any low sections that
could trap condensate. Seal all joints and provide
adequate hangers as required in the venting system
manufacturer’s Installation Instructions. The unit must
not support the weight of the vent pipe.